Io: A Volcanic Puzzle – NASA Solar System Exploration
1995年11月9日 · On 7 December 1995, Galileo will have its one and only opportunity for a close encounter with Jupiter's moon Io, the most volcanically active body in the solar system.
In Depth | Jupiter – NASA Solar System Exploration
Jupiter has 80 moons. Fifty-seven moons have been given official names by the International Astronomical Union (IAU). Another 23 moons are awaiting names. Jupiter's four largest moons – Io, Europa, Ganymede, and Callisto – were first observed by the astronomer Galileo Galilei in 1610 using an early version of the telescope.
10 Need-to-Know Things About Io - NASA Solar System Exploration
The moon Io is the most volcanically active world in the solar system. Io even has lakes of molten silicate lava on its surface.
In Depth | Europa – NASA Solar System Exploration
Europa orbits Jupiter every 3.5 days and is locked by gravity to Jupiter, so the same hemisphere of the moon always faces the planet. Jupiter takes about 4,333 Earth days (or about 12 Earth years) to orbit the Sun (a Jovian year).
In Depth | Moons – NASA Solar System Exploration
Jupiter's menagerie of moons includes the largest in the solar system (Ganymede), an ocean moon (Europa) and a volcanic moon (Io). Many of Jupiter's outer moons have highly elliptical orbits and orbit backwards (opposite to the spin of the planet).
Io Observer - NASA Solar System Exploration
6 天之前 · The Jovian moon Io is likely the most geologically active body in the solar system, offering insight into tidal heating, volcanic processes, and other phenomena. However, its location within Jupiter''s radiation belt presents significant engineering challenges that must be addressed to enable future missions to Io.
NASA Juno Data Indicate Another Possible Volcano on Jupiter …
2018年7月13日 · Data collected by NASA’s Juno spacecraft using its Jovian InfraRed Auroral Mapper (JIRAM) instrument point to a new heat source close to the south pole of Io that could indicate a previously undiscovered volcano on the small moon of Jupiter.
Io By the Numbers – NASA Solar System Exploration
6 天之前 · Io By the Numbers More Destinations Click for more Jupiter Click for more Earth Click for more ... Jupiter; Saturn; Uranus; Neptune; DWARF PLANETS Pluto; Ceres; Makemake; Haumea; Eris; HYPOTHETICAL Planet X; Moons. About Moons; BY DESTINATION Earth (1) Mars (2) Jupiter (95) Saturn (83) Uranus (27) Neptune (14) Pluto (5) Asteroids, Comets & …
Galleries | Galileo – NASA Solar System Exploration
2018年7月11日 · New data from NASA's Galileo spacecraft have prompted scientists to modify their concept of the interior structure of Jupiter's moon, Callisto, and suggest that Callisto has evolved differently than the other largest Jovian moons -- Io, Ganymede and Europa.
Volcanoes and Auroras Glow in Eclipse Movie of Jupiter's Moon Io
2001年2月4日 · The first movie ever made of Jupiter's moon Io while it is in eclipse shows bright spots of hot lava and changes in auroral glows. These images from NASA's Cassini spacecraft provide evidence that the auroras originate in electrical currents that connect Io and Jupiter along magnetic-field lines.